JW - 5地下电磁波探测系统是一种新型设备，它由数据采集系统和数据处理系统组成。
JW-5 borehole em system is a new instrument for downhole (or underground) geophysical survey, which consists of a data acquisition unite and a data processing unit.
与雷达和声纳技术相似，激光雷达(光探测和测距)的工作原理是通过向目标发射电磁波然后根据反射波构建图像。
Like its Cousins radar and sonar, lidar (light detection and ranging), works by broadcasting electromagnetic waves towards a target and then building up a picture from the reflection.
将天线安置在底部意味着传感器会探测到最少的电磁波。
Having the antenna at the bottom means less radio frequency waves are flooding the sensors.
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